Yup, you are so right. I went back and fixed the link.
I don't offroad, and the suspension is not really a long travel off road lifted type 4-link. However I think it would probably perform better than the stock springs. Kelderman might be the guys to go to for a lifted off road air suspension. They do not make anything that fits on my truck though, and none of it seems to be bolt-on and reversible.
On the Autoflex website, there is no information at all about the 4 link suspension kit, only the swing arm.